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Worldcoin integration/staging tree

Copyright (c) 2009-2014 Bitcoin Developers Copyright (c) 2011-2014 Litecoin Developers Copyright (c) 2013-2014 Worldcoin Developers

What is Worldcoin?

Worldcoin is an improved version of Bitcoin using Scrypt as a proof-of-work algorithm.

  • 30 second block targets
  • 20160 blocks to retarget difficulty
  • starts at 64 coins per block
  • subsidy is reduced 1% every week to a minimum reward of 1 WDC per block
  • ~265 million total coins

For more information, as well as an immediately usable, binary version of the Worldcoin client software, see


Worldcoin is released under the terms of the MIT license. See COPYING for more information or see

Development process

Developers work in their own trees, then submit pull requests when they think their feature or bug fix is ready.

If it is a simple/trivial/non-controversial change, then one of the Worldcoin development team members simply pulls it.

If it is a more complicated or potentially controversial change, then the patch submitter will be asked to start a discussion (if they haven't already) on irc at #worldcoin

The patch will be accepted if there is broad consensus that it is a good thing. Developers should expect to rework and resubmit patches if the code doesn't match the project's coding conventions (see doc/coding.txt) or are controversial.

The master branch is regularly built and tested, but is not guaranteed to be completely stable. Tags are created regularly to indicate new official, stable release versions of Worldcoin.


Testing and code review is the bottleneck for development; we get more pull requests than we can review and test. Please be patient and help out, and remember this is a security-critical project where any mistake might cost people lots of money.

Automated Testing

Developers are strongly encouraged to write unit tests for new code, and to submit new unit tests for old code.

Unit tests for the core code are in src/test/. To compile and run them:

cd src; make -f makefile.unix test

Unit tests for the GUI code are in src/qt/test/. To compile and run them:

qmake WORLDCOIN_QT_TEST=1 -o Makefile.test
make -f Makefile.test
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